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<div class="title">/data/users/hoss/faiss/Heap.cpp</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">/* Function for soft heap */</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &quot;Heap.h&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> C&gt;</div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="structfaiss_1_1HeapArray.html#a48afc496c73e982b8e10fde786628292">   19</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1HeapArray.html#a48afc496c73e982b8e10fde786628292">HeapArray&lt;C&gt;::heapify</a> ()</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;{</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; nh; j++)</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;        heap_heapify&lt;C&gt; (k, val + j * k, ids + j * k);</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;}</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> C&gt;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="structfaiss_1_1HeapArray.html#a3c686b3cc0594e6a284fa3a595bebdec">   27</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1HeapArray.html#a3c686b3cc0594e6a284fa3a595bebdec">HeapArray&lt;C&gt;::reorder</a> ()</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;{</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; nh; j++)</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;        heap_reorder&lt;C&gt; (k, val + j * k, ids + j * k);</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;}</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> C&gt;</div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="structfaiss_1_1HeapArray.html#abc3e17a9d369abc87353bccf07f7a4fc">   35</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1HeapArray.html#abc3e17a9d369abc87353bccf07f7a4fc">HeapArray&lt;C&gt;::addn</a> (<span class="keywordtype">size_t</span> nj, <span class="keyword">const</span> T *vin, TI j0,</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;                         <span class="keywordtype">size_t</span> i0, <span class="keywordtype">long</span> ni)</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;{</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keywordflow">if</span> (ni == -1) ni = nh;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    assert (i0 &gt;= 0 &amp;&amp; i0 + ni &lt;= nh);</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = i0; i &lt; i0 + ni; i++) {</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;        T * __restrict simi = get_val(i);</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;        TI * __restrict idxi = get_ids (i);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;        <span class="keyword">const</span> T *ip_line = vin + (i - i0) * nj;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; nj; j++) {</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;            T ip = ip_line [j];</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;            <span class="keywordflow">if</span> (C::cmp(simi[0], ip)) {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;                heap_pop&lt;C&gt; (k, simi, idxi);</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;                heap_push&lt;C&gt; (k, simi, idxi, ip, j + j0);</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            }</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;        }</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    }</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;}</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> C&gt;</div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="structfaiss_1_1HeapArray.html#ad3c61085b43dd54300ad97f1f9503330">   57</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1HeapArray.html#ad3c61085b43dd54300ad97f1f9503330">HeapArray&lt;C&gt;::addn_with_ids</a> (</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;     <span class="keywordtype">size_t</span> nj, <span class="keyword">const</span> T *vin, <span class="keyword">const</span> TI *id_in,</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;     <span class="keywordtype">long</span> id_stride, <span class="keywordtype">size_t</span> i0, <span class="keywordtype">long</span> ni)</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;{</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <span class="keywordflow">if</span> (id_in == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;        addn (nj, vin, 0, i0, ni);</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    }</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keywordflow">if</span> (ni == -1) ni = nh;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    assert (i0 &gt;= 0 &amp;&amp; i0 + ni &lt;= nh);</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = i0; i &lt; i0 + ni; i++) {</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        T * __restrict simi = get_val(i);</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        TI * __restrict idxi = get_ids (i);</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;        <span class="keyword">const</span> T *ip_line = vin + (i - i0) * nj;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        <span class="keyword">const</span> TI *id_line = id_in + (i - i0) * id_stride;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; nj; j++) {</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;            T ip = ip_line [j];</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;            <span class="keywordflow">if</span> (C::cmp(simi[0], ip)) {</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;                heap_pop&lt;C&gt; (k, simi, idxi);</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                heap_push&lt;C&gt; (k, simi, idxi, ip, id_line [j]);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;            }</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        }</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    }</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;}</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> C&gt;</div>
<div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="structfaiss_1_1HeapArray.html#ab1beefd73c023168c23d5443ee71e369">   85</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1HeapArray.html#ab1beefd73c023168c23d5443ee71e369">HeapArray&lt;C&gt;::per_line_extrema</a> (</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                   T * out_val,</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                   TI * out_ids)<span class="keyword"> const</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; nh; j++) {</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        <span class="keywordtype">long</span> imin = -1;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        <span class="keyword">typename</span> C::T xval = C::Crev::neutral ();</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        <span class="keyword">const</span> <span class="keyword">typename</span> C::T * x_ = val + j * k;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; k; i++)</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;            <span class="keywordflow">if</span> (C::cmp (x_[i], xval)) {</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;                xval = x_[i];</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;                imin = i;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            }</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        <span class="keywordflow">if</span> (out_val)</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;            out_val[j] = xval;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <span class="keywordflow">if</span> (out_ids) {</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;            <span class="keywordflow">if</span> (ids &amp;&amp; imin != -1)</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;                out_ids[j] = ids [j * k + imin];</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;            <span class="keywordflow">else</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;                out_ids[j] = imin;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        }</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    }</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;}</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="comment">// explicit instanciations</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;<span class="keyword">template</span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1HeapArray.html">HeapArray&lt;CMin &lt;float, long&gt;</a> &gt;;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;<span class="keyword">template</span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1HeapArray.html">HeapArray&lt;CMax &lt;float, long&gt;</a> &gt;;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="keyword">template</span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1HeapArray.html">HeapArray&lt;CMin &lt;int, long&gt;</a> &gt;;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;<span class="keyword">template</span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1HeapArray.html">HeapArray&lt;CMax &lt;int, long&gt;</a> &gt;;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;}  <span class="comment">// END namespace fasis</span></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_a3c686b3cc0594e6a284fa3a595bebdec"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#a3c686b3cc0594e6a284fa3a595bebdec">faiss::HeapArray::reorder</a></div><div class="ttdeci">void reorder()</div><div class="ttdoc">reorder all the heaps </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8cpp_source.html#l00027">Heap.cpp:27</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_ab1beefd73c023168c23d5443ee71e369"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#ab1beefd73c023168c23d5443ee71e369">faiss::HeapArray::per_line_extrema</a></div><div class="ttdeci">void per_line_extrema(T *vals_out, TI *idx_out) const </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8cpp_source.html#l00085">Heap.cpp:85</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html"><div class="ttname"><a href="structfaiss_1_1HeapArray.html">faiss::HeapArray</a></div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00349">Heap.h:349</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_ad3c61085b43dd54300ad97f1f9503330"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#ad3c61085b43dd54300ad97f1f9503330">faiss::HeapArray::addn_with_ids</a></div><div class="ttdeci">void addn_with_ids(size_t nj, const T *vin, const TI *id_in=nullptr, long id_stride=0, size_t i0=0, long ni=-1)</div><div class="ttdef"><b>Definition:</b> <a href="Heap_8cpp_source.html#l00057">Heap.cpp:57</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_a48afc496c73e982b8e10fde786628292"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#a48afc496c73e982b8e10fde786628292">faiss::HeapArray::heapify</a></div><div class="ttdeci">void heapify()</div><div class="ttdoc">prepare all the heaps before adding </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8cpp_source.html#l00019">Heap.cpp:19</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_abc3e17a9d369abc87353bccf07f7a4fc"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#abc3e17a9d369abc87353bccf07f7a4fc">faiss::HeapArray::addn</a></div><div class="ttdeci">void addn(size_t nj, const T *vin, TI j0=0, size_t i0=0, long ni=-1)</div><div class="ttdef"><b>Definition:</b> <a href="Heap_8cpp_source.html#l00035">Heap.cpp:35</a></div></div>
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